iot/labs/EFCoreTest/Entities.cs

using System;
using System.Collections.Generic;

namespace EFCoreTest
{
    public class Entity
    {
        public Guid Id { get; set; }
        public DateTime Created { get; set; }
        public DateTime LastChanged { get; set; }
        public string RowVersion { get; set; }
        public Entity()
        {
            this.Id = Guid.NewGuid();
        }

        public override string ToString()
        {
            return this.Id.ToString();
        }
    }

    public class User : Entity
    {
        public string UserName { get; set; }
        public List<UserRole> UserRoles { get; set; } = new List<UserRole>();
    }

    public class Role : Entity
    {
        public string Name { get; set; }
        public List<UserRole> UserRoles { get; set; } = new List<UserRole>();
    }

    public class UserRole : Entity
    {
        public Guid UserId { get; set; }
        public Guid RoleId { get; set; }
        public User User { get; set; }
        public Role Role { get; set; }
    }
}